KNIPEX 85 01 250 US Auto Adjusting Water Pump Pliers Self-controlled adjustment on the work piece simply by squeezing the handles- ideal for frequent changeover to work pieces of different size One-handed operation for left and right handed people Fine adjustment for favorable handle width Capacity: for nuts 10-36 mm (1 3/8-Inch) a/f; for pipes 1/8-Inch- 1 1/4-Inch Self-locking on pipes and nuts: no slipping on the work piece and low hand force required